/proh sim"ee euhn/ , adj.
1. belonging or pertaining to the primate suborder Prosimii, characterized by nocturnal habits, a long face with a moist snout, prominent whiskers, large mobile ears, and large, slightly sideways-facing eyes, comprising the lemur, loris, potto, bush baby, and aye-aye. Cf. anthropoid, tarsioid .
n.
2. a prosimian animal.
[ 1855-60; Prosimi ( i ) name of the suborder + -AN (see PRO- 1 , SIMIAN) ]